The author and activist turned 30 on Friday and got a sweet birthday shout out on social media from her husband, Chris Pratt.

"Happy Birthday Katherine!" the actor captioned a collage of photos of the couple, who married in June. "So happy to have you in my life. I don’t know what I’d do without you. Probably get locked out on the balcony somehow and have to live there or be wandering around some city with an uncharged phone and only one shoe, late for work like some kind of anxiety fever dream. I honestly don’t even want to think about it. You’ve changed my whole world for the better. I’m so grateful to have found you. You’re an incredible wife and step mom. And I’m so excited to celebrate you all weekend! ?✝️♥️."

Pratt recently celebrated his first Thanksgiving as an official member of the Schwarzenegger family, and his brother-in-law, Patrick Schwarzenegger, dished on the new seat at the table when he spoke with ET at the 2019 American Music Awards last month.

"He can eat a lot," he teased. "Me and Chris go at it at the desserts. He's a foodie. We both have the sweet tooth."